A neutron moving with a speed v strikes a hydrogen atom in the ground state moving toward it with the same speed. Find the minimum kinetic energy of the neutron for which inelastic (completely or partially) collision might take place. `("Take "m_(a)=m_(b).)`

Explanation

To solve the problem of finding the minimum kinetic energy of a neutron for which an inelastic collision with a hydrogen atom in the ground state might take place, we can follow these steps:

### Step 1: Understand the scenario
We have a neutron and a hydrogen atom, both moving towards each other with the same speed \( v \). The mass of the hydrogen atom is approximately equal to the mass of the neutron, which we can denote as \( m \).

### Step 2: Conservation of Momentum
In an inelastic collision, the total momentum before the collision is equal to the total momentum after the collision. The momentum of the neutron before the collision is \( mv \) and the momentum of the hydrogen atom is also \( mv \) (but in the opposite direction).

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